Ảnh hưởng của việc bón bã cà phê tươi lên sinh trưởng, năng suất một số cây trồng và đặc tính sinh học đất giồng cát (arenosols) từ huyện Tiểu Cần - tỉnh Trà Vinh trong điều kiện nhà lưới

Abstract

This study was to evaluate the effect of fresh spent coffee ground (FSCG) on growth and yields of maize, soybean and rice and on soil biological properties under nethouse conditions. Maize, soybean and rice were continuously cultivated in Arenosols taken from Tieu Can district, Tra Vinh province. Seven different treatments including the control (no fertilization), 2, 4, 6, 8, 10% of FSCG applied (w/w, based on the dry soil mass) and the treatment with recommended inorganic fertilizer were conducted. Four replicates were repeated for each treatment. Plant height, bacterial and fungal numbers in soil were sampled at day 30, 45 (60), 60 (90) after seedling. Besides, crop yields and structure of soil bacterial community at the end of the cultivation were collected. The results showed that an application dose of FSCG with either 2 or 10% was efficient on stimulation of the growth and yields of soybean and rice as compared to the recommended inorganic fertilizer treatment. Moreover, in these treatments, some soil fertility characteristics, the numbers of soil bacteria, fungi, nitrogen fixing bacterial and phosphate solubilizing bacterial increased signicifcantly compared to other treatments (without FSCG application) over three cropping seasons. Thus, it can conclude that FSCG can be applied with an application dose of 2% or 10% into soil as a soil clean amendment to soybean and rice for good production and sustainable agricultural development.